<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			#app {
				background:  no-repeat top center;
				background-size: 100%;
				height: 100vh;
			}
			/* 使用必须特别了解图片的宽，媒体查询大小就是图片宽度， */
			@media screen and (max-width:1300px) {
				#app{
					transition: 1s ease-in-out;
					background-size:auto 100%;
				}
			}
			/* #app:hover{
				width: 100vw;
				transition: 5s ease-in-out;
			} */
		</style>
	</head>
	<body>
		<!-- <div>
			<img style="width: 100%;" src="https://static-argvchs.netlify.app/images/home.jpg" />
		</div> -->
		<div id="app" style="background-image: url('https://static-argvchs.netlify.app/images/home.jpg');"></div>
		<script>
			// console.log(getComputedStyle(document.getElementById("app")))
			
		</script>
	</body>
</html>